Energies 2017, 10(3), 315; https://doi.org/10.3390/en10030315
An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment
Karam Hwang 1
, Jaeyong Cho 1, Dongwook Kim 1, Jaehyoung Park 1, Jong Hwa Kwon 2, Sang Il Kwak 2, Hyun Ho Park 3 and Seungyoung Ahn 1,*
, Jaeyong Cho 1, Dongwook Kim 1, Jaehyoung Park 1, Jong Hwa Kwon 2, Sang Il Kwak 2, Hyun Ho Park 3 and Seungyoung Ahn 1,*
1
Graduate School for Green Transportation, KAIST, Daejeon 34141, Korea
2
Electromagnetic Environment Research, ETRI, Daejeon 34129, Korea
3
Department of Electronic Engineering, University of Suwon, Hwaseong 18123, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Sheldon S. Williamson
Received: 2 January 2017 / Revised: 27 February 2017 / Accepted: 2 March 2017 / Published: 7 March 2017
(This article belongs to the Special Issue Advanced Power Electronics and Control for Wireless Power Transfer Systems)
Abstract
This paper proposes an autonomous coil alignment system (ACAS) for electric vehicles (EVs) with dynamic wireless charging (DWC) to mitigate the reduction in received power caused by lateral misalignment between the source and load coils. The key component of the ACAS is a novel sensor coil design, which can detect the load coil’s left or right position relative to the source coil by observing the change in voltage phase. This allows the lateral misalignment to be estimated through the wireless power transfer (WPT) system alone, which is a novel tracking method for vehicular applications. Once misalignment is detected, the vehicle’s lateral position is self-adjusted by an autonomous steering function. The feasibility of the overall operation of the ACAS was verified through simulation and experiments. In addition, an analysis based on experimental results was conducted, demonstrating that 26% more energy can be transferred during DWC with the ACAS, just by keeping the vehicle’s load coil aligned with the source coil. View Full-TextKeywords:
electric vehicle (EV); dynamic wireless charging (DWC); wireless power transfer (WPT); power degradation; coil misalignment; magnetic sensing
▼
Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
Share & Cite This Article
MDPI and ACS Style
Hwang, K.; Cho, J.; Kim, D.; Park, J.; Kwon, J.H.; Kwak, S.I.; Park, H.H.; Ahn, S. An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment. Energies 2017, 10, 315.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
Related Articles
Article Metrics
Comments
[Return to top]
Energies
EISSN 1996-1073
Published by MDPI AG, Basel, Switzerland
RSS
E-Mail Table of Contents Alert